71143739 has 2 divisors, whose sum is σ = 71143740. Its totient is φ = 71143738.

The previous prime is 71143703. The next prime is 71143747. The reversal of 71143739 is 93734117.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71143739 is a prime.

It is a super-2 number, since 2×71143739² = 10122863197800242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71143699 and 71143708.

It is not a weakly prime, because it can be changed into another prime (71143769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35571869 + 35571870.

It is an arithmetic number, because the mean of its divisors is an integer number (35571870).

Almost surely, 2^71143739 is an apocalyptic number.

71143739 is a deficient number, since it is larger than the sum of its proper divisors (1).

71143739 is an equidigital number, since it uses as much as digits as its factorization.

71143739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 35.

The square root of 71143739 is about 8434.6748010815. The cubic root of 71143739 is about 414.3610217950.

The spelling of 71143739 in words is "seventy-one million, one hundred forty-three thousand, seven hundred thirty-nine".